Predicting Deformation Limits of Dual-Phase Steels Under Complex Loading Paths

Journal Article · Wed Apr 05 00:00:00 EDT 2017 · JOM. Journal of the Minerals, Metals & Materials Society

DOI:https://doi.org/10.1007/s11837-017-2333-7· OSTI ID:1357065

Cheng, G. ^[1]; Choi, K. S. ^[1]; Hu, X. ^[1]; Sun, X. ^[1]

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1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

Here in this study, the deformation limits of various DP980 steels are examined with the deformation instability theory. Under uniaxial tension, overall stress–strain curves of the material are estimated based on a simple rule of mixture (ROM) with both iso-strain and iso-stress assumptions. Under complex loading paths, an actual microstructure-based finite element (FE) method is used to resolve the deformation compatibilities explicitly between the soft ferrite and hard martensite phases. The results show that, for uniaxial tension, the deformation instability theory with iso-strain-based ROM can be used to provide the lower bound estimate of the uniform elongation (UE) for the various DP980 considered. Under complex loading paths, the deformation instability theory with microstructure-based FE method can be used in examining the effects of various microstructural features on the deformation limits of DP980 steels.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
• Grant/Contract Number: EE0005976; AC05-76RL01830
• OSTI ID: 1357065
• Report Number(s): PNNL-SA-122713; PII: 2333
• Journal Information: JOM. Journal of the Minerals, Metals & Materials Society, Vol. 69, Issue 6; ISSN 1047-4838
• Publisher: Springer
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE